Title :
A 0.8-V accurately tuned linear continuous-time filter
Author :
Vemulapalli, Gowtham ; Hanumolu, Pavan Kumar ; Kook, Youn-Jae ; Moon, Un-Ku
Author_Institution :
Texas Instrum. Inc., Dallas, TX, USA
Abstract :
An accurately tuned low-voltage linear continuous-time filter is presented in this paper. Accurate tuning is achieved using time-constant matched master-slave tuning combined with power-up mismatch calibration. A low-pass biquad designed for a corner frequency of 115 kHz achieves better than -80-dB total harmonic distortion with a 250-mVpp 10-kHz input signal. The prototype implemented in 0.18-μm CMOS process occupies an area of 0.4 mm2 and dissipates 4.6 mW (2.6 mW for the filter and 2 mW for tuning) of power.
Keywords :
CMOS analogue integrated circuits; biquadratic filters; continuous time filters; integrated circuit design; low-pass filters; timing circuits; tuning; 0.18 micron; 0.8 V; 10 kHz; 115 kHz; 4.6 mW; CMOS; biquad designe; calibration; master-slave tuning; total harmonic distortion; tuned linear continuous time filter; CMOS process; Calibration; Frequency; Master-slave; Nonlinear filters; Power harmonic filters; Prototypes; Signal design; Total harmonic distortion; Tuning; Continuous-time filter; R-MOSFET-C; linear; low-voltage; master–slave tuning; power-up mismatch calibration;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2005.848170
